package org.example.controller;

import jakarta.validation.constraints.Pattern;
import org.example.pojo.Result;
import org.example.pojo.User;
import org.example.service.impl.UserService;
import org.example.utils.JwtUtil;
import org.example.utils.Md5Util;
import org.example.utils.ThreadLocalUtil;
import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.handler.UserRoleAuthorizationInterceptor;

import java.util.HashMap;
import java.util.Map;


@RestController
@RequestMapping("/user")
@Validated
public class UserController {
    @Autowired
    private UserService userService;
    @PostMapping("/register")
    public Result register(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password){

//        if (username !=null && username.length()>=5 && username.length()<=16 &&
//                password !=null && password.length()>=5 && password.length()<=16){
            //查询用户
            User u = userService.findByUserName(username);
            if (u==null){
            //没有占用
            //注册
            userService.register(username,password);
            return Result.success();}
            else {
                //占用
                return Result.error("用户名已被占用");
        }
//        }else {
//            return Result.error("参数不合法");
//        }


    }
    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}$") String username,@Pattern(regexp = "^\\S{5,16}$") String password){
//        根据用户名查询用户
        User loginUser = userService.findByUserName(username);
//        判断该用户是否存在
        if (loginUser==null){
            return  Result.error("用户名错误");
        }

//        判断密码是否正确 loginUser对象中的password是密文
        if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){
//            登录成功
            Map<String,Object> claims = new HashMap<>();
            claims.put("id",loginUser.getId());
            claims.put("username",loginUser.getUsername());
            ThreadLocalUtil.set(claims); // 将用户信息存储到 ThreadLocal 中
            String token = JwtUtil.genToken(claims);

            return  Result.success(token);
        }
        return  Result.error("密码错误");
    }
    @GetMapping("/userInfo")
    public Result<User> userInfo(/*@RequestHeader(name = "Authorization")String token*/){
        //根据用户名查询用户
//        Map<String,Object> map = JwtUtil.parseToken(token);
//        String username = (String) map.get("username");
        Map<String,Object> map = ThreadLocalUtil.get();
//        if(map == null) {
//            return Result.error("用户未登录或会话已过期");
//        }

        String username = (String) map.get("username");
//        if(username == null) {
//            return Result.error("无法获取用户信息");
//        }
        User user = userService.findByUserName(username);
        return Result.success(user);
    }

    @PutMapping("/update")
    public Result update(@RequestBody @Validated User user){
        userService.update(user);
        return Result.success();
    }
    @PatchMapping("updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl){
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }
    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params){
        //1.校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");
        //确认密码
        if(!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)){
            return Result.error("缺少必要的参数");
        }
        //原密码是否正确
        //调用userService根据用户名拿到原密码，再和old_pwd比对
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
        User loginUser = userService.findByUserName(username);
        if(!loginUser.getPassword().equals((Md5Util.getMD5String(oldPwd)))){
            return Result.error("原密码填写不正确");
        }
        //校验newPwd和rePwd是否一样
        if(!rePwd.equals((newPwd))){
            return Result.error("两次填写的新密码不一样");
        }
        //2.调用service完成密码更新
        userService.updatePwd(newPwd);
        return Result.success();
    }
}

